Reductive immobilization of Re(VII) by graphene modified nanoscale zero-valent iron particles using a plasma technique

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• 作者：Jie Li ; Changlun Chen ; Rui Zhang ; Xiangke Wang
• 关键词：reductive immobilization ; Re(VII) ; NZVI/rGOs ; plasma technique
• 刊名：SCIENCE CHINA Chemistry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：59
• 期：1
• 页码：150-158
• 全文大小：1,332 KB
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• 作者单位：Jie Li (1) (2)
  Changlun Chen (1) (3)
  Rui Zhang (1) (2)
  Xiangke Wang (3) (4) (5)
  
  1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, China
  2. University of Science and Technology of China, Hefei, 230026, China
  3. Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, 215123, China
  4. School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou, 215123, China
  5. Faculty of Engineering, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Chinese Library of Science
  Chemistry
  
• 出版者：Science China Press, co-published with Springer
• ISSN：1869-1870

文摘

Technetium-99 (99Tc), largely produced by nuclear fission of 235U or 239Pu, is a component of radioactive waste. This study focused on a remediation strategy for the reduction of pertechnetate (TcO ₄ - ) by studying its chemical analogue rhenium (Re(VII)) to avoid the complication of directly working with radioactive elements. Nanoscale zero-valent iron particles supported on graphene (NZVI/rGOs) from GOs-bound Fe ions were prepared by using a H₂/Ar plasma technique and were applied in the reductive immobilization of perrhenate (ReO ₄ - ). The experimental results demonstrated that NZVI/rGOs could efficiently remove Re from the aqueous solution, with enhanced reactivity, improved kinetics (50 min to reach equilibrium) and excellent removal capacity (85.77 mg/g). The results of X-ray photoelectron spectroscopy analysis showed that the mechanisms of Re immobilization by NZVI/rGOs included adsorption and reduction, which are significant to the prediction and estimation of the effectiveness of reductive TcO ₄ - by NZVI/rGOs in the natural environment.